Dinosaur Elect. Large Cover for Ignitor Control BoardsThis is a clear cover to protect the UIB L or UIB L Post ignitor boards. These ABS covers offer protection from contamination and moisture while still allowing you to see the diagnostic LED. This cover works with water heaters and refrigerators only, not for use in furnaces. The large cover fits large 3.5″ X 5.1″ ignitor boards.Compatible withUIB L and UIB L Post